Wireless Communication Device

1. An access point in a wireless network, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to: receive multiple frames from multiple wireless communication terminals, each of the wireless communication terminals having a distinct association identifier (AID); generate a block acknowledgement (BA) frame to acknowledge the multiple frames, wherein the BA frame comprises a BA information field that has a variable length and includes one or more information subfields being generated by repeating an information subfield format for each traffic identifier (TID) of each distinct wireless communication terminal AID associated with the BA frame; and transmit the BA frame to the multiple wireless communication terminals, wherein the information subfield format comprises a Per-TID information subfield, a BA starting sequence control subfield, and a BA bitmap subfield, wherein the Per-TID information subfield comprises an association identifier (AID) subfield, an ACK type subfield, and a TID subfield, wherein an AID in the AID subfield is associated with a wireless communication terminal that is intended to receive a corresponding information subfield, wherein the Per-TID information subfield is 2 octets in length, wherein the AID subfield is 11 bits in length, the ACK type subfield is 1 bit in length, and the TID subfield is 4 bits in length.

2. The access point of claim 1, wherein the BA frame further comprises a BA control field that indicates if the BA frame is to provide acknowledgement responses to the multiple wireless communication terminals.

3. The access point of claim 1, wherein the BA starting sequence control subfield and the BA bitmap subfield are present when the ACK type subfield indicates block acknowledgement, and the BA starting sequence control subfield and the BA bitmap subfield are omitted when the ACK type subfield indicates acknowledgement.

4. The access point of claim 1, wherein the one or more processors are configured to simultaneously receive the multiple frames from the multiple wireless communication terminals.

5. The access point of claim 1, wherein the one or more processors are further configured to: transmit a trigger frame of uplink multi-user transmission to the multiple wireless communication terminals; and simultaneously receive the multiple frames frame from the multiple wireless communication terminals in response to the trigger frame, wherein the multiple frames comprise information requesting acknowledgment response.

6. A wireless communication terminal in a wireless network, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to: transmit a frame to an access point, wherein the frame is transmitted, to the access point, with at least one other frame from at least one other wireless communication terminal having a distinct association identifier (AID); receive a block acknowledgement (BA) frame to acknowledge the frame, wherein the BA frame comprises a BA information field that has a variable length and includes one or more information subfields being generated by repeating an information subfield format for each traffic identifier (TID) of each distinct wireless communication terminal AID associated with the BA frame; and examine the BA information field to determine if the frame has been successfully received by the access point, wherein the information subfield format comprises a Per-TID information subfield, a BA starting sequence control subfield, and a BA bitmap subfield, wherein the Per-TID information subfield comprises an association identifier (AID) subfield, an ACK type subfield, and a TID subfield, wherein an AID in the AID subfield is associated with the wireless communication terminal that is intended to receive a corresponding information subfield, wherein the Per-TID information subfield is 2 octets in length, wherein the AID subfield is 11 bits in length, the ACK type subfield is 1 bit in length, and the TID subfield is 4 bits in length.

7. The wireless communication terminal of claim 6, wherein the BA frame further comprises a BA control field that indicates if the BA frame is to provide acknowledgement responses to multiple wireless communication terminals.

8. The wireless communication terminal of claim 6, wherein the BA starting sequence control subfield and the BA bitmap subfield are present when the ACK type subfield indicates block acknowledgement, and the BA starting sequence control subfield and the BA bitmap subfield are omitted when the ACK type subfield indicates acknowledgement.

9. The wireless communication terminal of claim 6, wherein the one or more processors are further configured to: receive a trigger frame of uplink multi-user transmission from the access point; and simultaneously transmit the frame, to the access point, with at least one other frame from at least one other wireless communication terminal in response to the trigger frame.

10. The wireless communication terminal of claim 6, wherein the frame comprises information requesting acknowledgment response to the frame.

11. A method for facilitating wireless communication in a wireless communication terminal, comprising: transmitting a frame to an access point from the wireless communication terminal, wherein the frame is transmitted, to the access point, with at least one other frame from at least one other wireless communication terminal, wherein the wireless communication terminal and each other wireless communication terminal have a distinct association identifier (AID); and receiving a block acknowledgement (BA) frame to acknowledge the frame, wherein the BA frame comprises a BA information field that has a variable length and includes one or more information subfields being generated by repeating an information subfield format for each traffic identifier (TID) of each distinct wireless communication terminal AID associated with the BA frame; and examining the BA information field to determine if the frame has been successfully received by the access point, wherein the information subfield format comprises a Per-TID information subfield, a BA starting sequence control subfield, and a BA bitmap subfield, wherein the Per-TID information subfield comprises an association identifier (AID) subfield, an ACK type subfield, and a TID subfield, wherein an AID in the AID subfield is associated with the wireless communication terminal that is intended to receive a corresponding information subfield, wherein the Per-TID information subfield is 2 octets in length, wherein the AID subfield is 11 bits in length, the ACK type subfield is 1 bit in length, and the TID subfield is 4 bits in length.

12. The method of claim 11, wherein the BA frame further comprises a BA control field that indicates if the BA frame is to provide acknowledgement responses to multiple wireless communication terminals.

13. The method of claim 11, wherein the BA starting sequence control subfield and the BA bitmap subfield are present when the ACK type subfield indicates block acknowledgement, and the BA starting sequence control subfield and the BA bitmap subfield are omitted when the ACK type subfield indicates acknowledgement.

14. The method of claim 11, further comprising: receiving a trigger frame of uplink multi-user transmission from the access point; and simultaneously transmitting the frame, to the access point, with at least one other frame from at least one other wireless communication terminal in response to the trigger frame, wherein the frame comprises information requesting acknowledgment response to the frame.